Abstract:
The present invention relates to a cathode ray tube having a deflection yoke including a circular ferrite core and a deflection coil whose cross-section is in a rectangular shape for improving a deflection sensitivity of the cathode-ray tube, and more particularly to a cathode ray tube, in which one part of a vertical deflection coil having a rectangular shaped cross-section to improve a lead-in capability when winding the vertical deflection coil located between a ferrite core and the holder is separated by a predetermined gap from a holder that isolates a horizontal deflection coil and the vertical deflection coil.
Abstract:
Disclosed is a deflection yoke which is so configured that a coil separator and horizontal deflection coils have angular cross sectional shapes and a ferrite core and vertical deflection coils have circular cross sectional shapes to improve deflection sensitivity thereby reducing power consumption.
Abstract:
In a semi-toroidal deflection yoke, a middle point CL(M) of an entire length along a tube axis from a large-diameter portion to a small-diameter portion of a magnetic core lies on a small-diameter portion side of a horizontal deflection coil relative to a point lying at a distance of 0.41×HL along the tube axis from a large-diameter portion of the horizontal deflection coil, where HL is an entire length of the horizontal deflection coil along the tube axis. The deflection yoke deflects electron beams efficiently, reducing the deflection electric power the deflection yoke requires. A cathode ray tube provided with the deflection yoke can suppress pincushion type distortion which may occur in the vertical direction of a screen, and can therefore display images of satisfactory quality.
Abstract:
A projection type cathode ray tube device includes a panel, a neck, a funnel connecting the panel to one end of the neck, and a stem closing the other end of the neck. An electron gun is housed in the neck for projecting an electron beam toward a phosphor screen on the panel. The neck includes a small-diameter neck portion disposed on its funnel side, a large-diameter neck portion disposed on its stem side, and a neck junction region connecting the small-diameter neck portion and the large-diameter neck portion. A deflection yoke is disposed in a vicinity of a transition region between the funnel and the small-diameter neck portion. A convergence yoke for generating a beam-convergence magnetic field is disposed to extend from the large-diameter neck portion and surround at least a portion of the neck junction region.
Abstract:
An electron beam trajectory controlling device includes a main deflection section having a first main coil and defining a first path and being configured to control a trajectory of an electron traveling along the first path. The main deflection section includes a first auxiliary coil provided proximate the first main coil. A minor deflection section is provided adjacent to the main deflection section and has a first minor coil that is coupled to the first auxiliary coil. The minor deflection section defines a second electron path that is aligned to the first path. The minor deflection section cooperates with the main deflection section to control the trajectory of the electron.
Abstract:
A color cathode ray tube has an electron gun including a cathode structure for emitting three electron beams, a first electrode serving as a control electrode, a second electrode serving as an accelerating electrode and plural focus electrodes and an anode arranged in the order named, a phosphor screen composed of repeating patterns of three-color phosphor elements, a color selection electrode positioned the electron gun and the phosphor screen. The following inequalities are satisfied. {(L+1360×D−600)/280}2+{(P−0.16)/0.06}2≦1, L+1360×D≧600, and P≧0.16, where D (mm) is a horizontal diameter of electron beam apertures in the first electrode, L (mm) is a distance from a midplane between the anode and one of the focus electrodes adjacent to, but spaced from the anode, to a center of the phosphor screen, and P (mm) is a horizontal center-to-center distance between a first phosphor element of a first color of the three-color phosphor elements in a first horizontal row of the repeating patterns and a second phosphor element of the first color which is nearest to the first phosphor element and is in a second horizontal row adjacent to the first horizontal row, at the center of the phosphor screen.
Abstract:
A method and device are described for detecting whether a flash (F) has occurred in the high voltage part of a combined high voltage and horizontal deflection circuit (100) in an apparatus comprising a cathode ray tube (CRT), such as for instance a television set, a monitor, etc. The possible flash is detected by checking the fly-back pulse (70) of the horizontal deflection circuit (16) for deviations that reflect the occurrence of a flash. One possible distortion indicative for the occurrence of a flash is bouncing of the fly-back pulse. Another possible distortion indicative for the occurrence of a flash is collapse of the fly-back pulse. Another possible deviation indicative for the occurrence of a flash is a substantial decrease of the storage time (&tgr;S) of the line deflection transistor (30).
Abstract:
A main lens includes a second segment, a sixth grid and an additional electrode disposed between the second segment and the sixth grid. A first-level constant voltage and a second-level constant voltage are applied to the second segment and sixth grid, respectively. A third-level voltage, which is at a level between the first level and the second level, is applied to the additional electrode. In accordance with the increase in a deflection amount of an electric beam, the third-level voltage varies as a value expressed by ((voltage to the additional electrode)−(voltage to the second segment))/((voltage to the sixth grid)−(voltage to the second segment)). An auxiliary lens having lenses including a third grid and a first segment has a focusing power decreasing in accordance with an increase in the deflection amount of the electron beam.
Abstract:
A cathode ray tube (CRT) having a particular funnel configuration allows electron beams to be deflected to the phosphor surface of the panel without obstruction. The configuration of the yoke attachment portion of the funnel is based upon a curvature of an inner surface of the funnel and based upon a thickness of the funnel. The inner surface of the yoke attachment portion is at a recession from the curvature of the inner surface of the funnel. In one embodiment, if the depth of the recession is S and the thickness of the funnel is T, the recession depth of the inner surface of the yoke attachment portion is 0.1×Tmm≦S≦0.5×Tmm.
Abstract translation:具有特定漏斗形状的阴极射线管(CRT)允许电子束偏转到面板的荧光体表面而没有阻碍。 漏斗的轭附接部分的构型基于漏斗的内表面的曲率并且基于漏斗的厚度。 磁轭安装部分的内表面与漏斗的内表面的曲率相反。 在一个实施例中,如果凹陷的深度为S且漏斗的厚度为T,则轭安装部分的内表面的凹陷深度为0.1×Tmm <= S <= 0.5×Tmm。
Abstract:
Disclosed a color purity and convergence magnet (PCM) for a color cathode ray tube capable of fine-adjusting irrespective of the position of the axial direction of the tube, reducing the influence of an adjusting magnetic field on an electron gun, and increasing the workability for the color cathode ray tube. The color purity and convergence magnet for a color cathode ray tube comprising an inner ring magnet and an outer ring magnet being mounted at the outer circumference of a neck portion in the tube and arranged externally and internally in a radial direction on the same surface orthogonal to the tube axis so as to adjust the static characteristics of the color purity and convergence, wherein a magnetizing force of the same number of poles such as two-pole, four-pole and six-pole is formed at the same angle of the circumference is characterized in that the inner surface of the inner ring magnet is magnetized, and the magnetizing force of the inner ring magnet is smaller than that of the outer ring magnet in a strength.